Today: Sunny. Highs in the lower 60s to mid 70s. West winds 10 to 20 mph and becoming south 10 to 15 mph in the afternoon.

Tonight: Mostly cloudy. Breezy. A slight chance of showers after midnight. Lows near 50. West winds 10 to 20 mph increasing to 20 to 30 mph after midnight.

Sunday: Mostly cloudy. Breezy. A chance of showers in the morning, then a slight chance of showers in the afternoon. Highs in the 50s to upper 60s. West winds 20 to 30 mph decreasing to 10 to 20 mph in the afternoon.

Sunday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 40s to lower 50s. West winds 10 to 15 mph.

Memorial Day: Mostly cloudy in the morning then becoming partly cloudy. Highs in the 60s to lower 70s. Southwest winds 5 to 10 mph increasing to 10 to 20 mph in the afternoon.

Monday Night: Mostly clear in the evening then becoming partly cloudy. Lows in the upper 40s to mid 50s.

Tuesday: Sunny. Highs in the mid 60s to upper 70s.

Tuesday Night: Mostly clear in the evening then becoming partly cloudy. Lows in the lower to mid 50s.

Wednesday: Mostly cloudy in the morning then becoming sunny. A slight chance of showers. Highs in the mid 60s to lower 80s.

Wednesday Night: Mostly clear. Lows in the upper 40s to mid 50s.

Thursday: Sunny. A slight chance of showers. Highs in the mid 60s to lower 80s.

Thursday Night and Friday: Mostly clear. Lows in the 50s. Highs in the upper 60s to lower 80s.

Impacts - E19 Information

20.0 Feet

Erosion of lowest agricultural areas along river begins.

22.0 Feet

In the city of Napa, the Napa River Dry Bypass is fully inundated and flow begins to cross McKinstry Street.

24.0 Feet

In the city of Napa, flow begins to leave the Napa River channel at RiverPointe (North of Lincoln Avenue).

25.0 Feet

Flooding of lowest parts of towns in reach begins. Inundation of lowest agricultural land in Napa Valley. Some secondary roads are inundated. Moderate damage from bank erosion and sediment deposition throughout the reach.

26.0 Feet

In the city of Napa, flow begins to leave the Napa River channel in the South Coombs area (north of Imola Avenue) and the south oxbow (near Taylor Street). Crop losses and erosion damage become serious. Moderate flood damage in lower parts of urban areas along the reach. Transportation in the Napa Valley becoming difficult. The flood of 2/3/1998 measured 26.72 feet.

27.0 Feet

In the city of Napa, moderate flooding begins on the east side of Napa River near Milliken Creek Inn.

28.0 Feet

In the city of Napa, significant flooding occurs near Lincoln Avenue with some secondary roads inundated. Major flooding of towns within the reach of the gage, especially Napa. Inundation of agricultural land, major damage from bank erosion and sediment deposition in Napa Valley. Transporation difficult throughout the Napa Valley. The 1/1/1997 flood measured 28.07 feet and cut off east-west travel except at Highway 29 over the Napa River.

29.0 Feet

In the city of Napa, the Soscol Corridor between the Bypass and LakePark is inundated, and the LakePark area begins to flood and flow begins to leave the Napa River at Riverside Drive.

30.0 Feet

In the city of Napa, flooding in the south oxbow area expands south towards Tulocay Creek and Imola Avenue begins to flood on both sides of the river. Major flooding continues in the Napa Valley, with major damage to homes and businesses, especially in Napa. Transportation impossible in the Napa Valley. 20,000 acres possible flooded in the Napa Valley. Between 5,000 and 7,000 evacuations occurred in the 2/18/1986 record flood, 37,000 cfs and 30.20 feet.

32.0 Feet

Widespread flooding occurs in the entire Napa Valley, with transportation impossible. Disastrous damage to homes and businesses in the Napa Valley, especially the city of Napa.

Product Disclaimer

This river graphic is not intended to serve as a
substitute for official flood watches, warnings, advisories, or statements
issued by the NWS San Francisco Bay Area-Monterey Weather Forecast Office. Observations
are preliminary and subject to change. River levels identified as "forecast"
should be consistent with those contained in official NWS products.
River levels identified as "guidance" have significant uncertainty
due to future weather or reservoir regulation and are provided for planning
purposes only.